示范答案：
Okay，reasons are many, to begin with, most comments are posted anonymously. It means that even if you’ve thrown some harsh even aggressive comments on somebody, nobody can find you out, so you would not be exposed or sued for your words. Besides, the discussion even debates towards current issues are intense on the internet. So at a certain moment, people are not rational anymore, they tend to be angry at others who have conflicting opinions. That’s the reason we see cyberbullying and stories like that.
